Transformer Replacement for Roland Synths and Others

I got the request for a transformer replacement, to convert the JX-3P from a 117V version to a 230V version. So I ordered suitable torroid transformers at Meanwhile I provide other transformers too. See the list below.

This is the transformer with the included mounting material:

Electrical specifications:
Type / Modelsprimarysecondary 1secondary 2secondary 3comment
Type 1 / JX-3P2 x 115V or 1 x 230V / 20VA16V / 0.4A16V / 0.4A9V / 0.8Aavailable
Type 2 / TR-909, Juno-1, Juno-2, Juno-62 x 115V or 1 x 230V / 20VA18V / 0.4A18V / 0.4A9.5V / 0.5Aavailable
Type 3 / Waldorf Microwave 1 A+B, Yamaha DX7, generic Eurorack and similar2 x 115V or 1 x 230V / 50VA15V / 1.0A15V / 1.0A9.0V / 2.2Aavailable
NEW: Type 4 / Juno-106, JX-8P2 x 115V or 1 x 230V / 50VA19V / 0.3A19V / 0.3A9.5V / 0.9Aordered /
assumingly avalaible end of July 2024

Mechanical dimensions:
Typediameterheight spoolminimum height incl wires
Types 1, 2, 466mm / 2.5"30mm / 1.1"36mm / 1.4" (fits into a 1HU rack enclosure)
Type 378mm / 3.1"38mm / 1.5"43mm / 1.7"

I am selling these transformers as spare parts. The corresponding modifications must be undertaken by qualified persons. I REJECT ALL LIABILITY FOR ALL CONSEQUENCES OF USING THIS DEVICES. I WILL NOT ANSWER ANY QUESTIONS ON HOW TO DO THIS. PERSONS WHO HAVE TO ASK QUESTIONS ABOUT THAT ARE APPEARENTLY NOT QUALIFIED TO UNDERTAKE THE MODIFICATION! By sending an order for this transformer you agree with these conditions.


TypeGermanyEuropean Union
(no VAT-ID)
European Union with VAT-ID or
outside the European Union
types 1, 2, 442,84€36,00€ plus your local VAT36,00€
type 357,12€48,00€ plus your local VAT48,00€
These prices may change if our supplier changes its pricing.

Order process

  • To order a transformer please use the ORDER PAGE
  • I will confirm the receipt of the order by mail.
  • If the transformers are available from stock I will send an invoice. With this invoice the contract of sale is concluded.
  • If I run out of stock, it takes around three to four weeks to order new ones. I will inform you about this delay. I will send the invoice not before the stock is filled again
  • I ship once a week (usually on wednesday). I ship with assured and tracked parcels by DHL (this is german postal services - don't mismatch with DHL international). This will be delivered usually with your national postal services. At the moment the shipping rates are like this:
    • Shipping in Germany is 5,49 Euro (incl insurance and tracking).
    • Shipping within the EU is 10.49 Euro plus 2.50 Euro tracking and insurance.
    • Shipping outside the EU is at the moment 17.99 Euro plus 4.- Euro tracking and insurance.
    These shipping costs may change, so please check the website of Deutsche Post).
  • For packaging I reuse material that came in. I think this is the most ecological way to avoid waste.

PLEASE DO NOT MAKE ANY PAYMENTS WITHOUT HAVING RECEIVED AN INVOICE. If you send money whithout having received an invoice I have to return the money to keep my bookkeeping clean.

For ordering please use the order page.

© florian anwander May 2021-Oct 2023